Dental form.



R. JQ WENKER.

DENTAL FORM.

APPLICATION r-ILBD 14.153,25, 1912.

1,045,920. Patented 1390.3,1912

5m vente@ @Hou/w15 commun PLANOGRAPH COA. WASHINGTDN. D. c.

RAYMOND J. WENKER, OF MILWAUKEE, WISCONSIN.

DENTAL FORM.

Specification of Letters Patent.

Patented Dec. 3, 1912.

Application led March 25, 1912. Serial No. 686,046.

T 0 all whom 't may concern:

Be it known that I, RAYMOND J. WENKER, a citizen of the United States,residing at Milwaukee, county of Milwaukee, and State of IMisccnsin,have invented new and useful Improvements in Dental Forms, of which thefollowing is a specication.

My invention relates to improvements in that class of dental forms whichare adapt-ed to be used by instructors in dentistry for demonstrationpurposes, and it pertains more especially, among other things, rst, tothe construction of the teeth supporting members which represent thegums, teeth and a portion of the upper and lower jaws of a person, inwhich forms the roots of the teeth are embedded, and second, to thepeculiar construction of the teeth by which they are more securelyretained in place in such members.

My invention is further explained by reference to the accompanyingdrawings, in which- Figure l is a side view of one of the forms whichrepresents a portion of the lower jaw, part broken away, and Fig. 2 is avertical section of the form shown in Fig. 1.

Like parts are identified by the same reference numerals in both views.

l represents the body of the form which is preferably made of hard,black, vulcanized rubber, or other similar material.

2 represents the gums and exterior surface of the form which ispreferably made of soft iesh colored rubber or similar material.

3 represents a set of articial teeth, the exterior or protruding ends ofwhich are of ordinary construction, while their inner ends arepreferably provided with notches 4, 4, in which notches the inclosingrubber or other like material is adapted to engage, whereby the teethare securely retained in place.

It will be understood that the object of forming the interior portion ofthe form l of hard material, is to more securely hold the teeth, wherebythe liability of their becoming loose when being operated upon, isavoided, while the exterior portion 2 of the form is made of softeryielding material so as to more closely resemble the natural gums of aperson, which material, when required, may be forced down around thesides of the teeth or pressed to one side, as circumstances may require,when operating on the teeth.

While I have shown and described a form which represents the lower jaw,gums and teeth of a person, it will be understood that in practice, asimilar form is used to represent the upper jaw, gums and teeth. While Ipreferably use vulcanized rubber in said forms to support the teeth, anyequivalent material may, if desired, be substituted therefor.

While I have shown a full unbroken set of teeth in the drawings, it willbe understood that some of the teeth may be omitted to betterdemonstrate methods of constructing bridge work in connection therewith,and my invention is also intended to cover forms in which a partial setof artificial teeth only are used in connect-ion with a partial jaw, andwhile the interior is described as being hard and the exterior soft, itwill be understood that the degree of hardness of such material may bechanged, providing, however, that the exterior surface is alwayspreferably somewhat softer than the interior.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a device of the described class, a dental form resembling aportion of one of the jaws of a person, comprising a hard interiorportion and a relatively softer yielding exterior portion, incombination with artificial teeth.

2. A dental form resembling a portion of one of the jaws of a person,comprisinga relatively hard interior portion and a yielding exteriorportion, in combination with artificial teeth provided at their innerends with retaining grooves or recesses.

3. A dental form resembling a portion of one of the jaws of a person,comprising a relatively hard interior portion formed of black vulcanizedrubber, and a yielding exterior portion, in combination with artificialteeth.

4. A dental form resembling a portion of one of the jaws of a person,comprising a relatively hard interior portion and a yielding exteriorportion formed of soft esh colored vulcanized rubber, in combinationwith artificial teeth.

5. A. dental form resembling a portion of In testimony whereof I affixmy signature onle of thehjayfs of a person, oonflprisiig in the presenceof tWo Witnesses. re atively ar interior y ortion orme o blackvulcanized rubber, eind a yielding eX- RAYMOND J WENKER' 5 teriorportion formed of soft flesh colored Witnesses:

vulcanized rubber, in combination with arti- JAS. B. ERWIN, icial teeth.IRMA D. BREMER.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

